package cn.zhanghu;

/**
 * Created by dell on 2017/7/4.
 */
public class Rectangle {
    public static void main(String[] args){
        //Area area=new Area(30,40);
        Volume v=new Volume(90,78,10);
        System.out.println("面积："+v.area());
        System.out.println("体积："+v.volume());

    }
}
